SEISMIC BEHAVIOUR AND RETROFIT OF PRE-1970' S AS- BUIL T EXTERIOR BEAM-COLUMN JOINTS REINFORCED BY PLAIN ROUND BARS

摘要

Four exterior beam-column joints reinforced by plain round bars designed according to pre-1970' s codes were subjected to simulated seismic loading. Each of the test units was full size in scale. The main test variables were the manner in Which the longitudinal beam bars were hooked in the joint core and the level of the axial load applied to the columns. The amount of transverse reinforcement in the beams, columns and joint cores was very small, as was typical of the pre-1970' s.